public static void AlignBottomTo(this SCNNode self, SCNNode from, float offset = 0)
{
var y = self.ConvertPositionFromNode(new SCNVector3(0, -from.Height() * 0.5F, 0), from).Y + (self.Height() * 0.5F) + offset;
self.Position = new SCNVector3(self.Position.X, y, self.Position.Z);
}
public static void Center(this SCNNode self)
{
SCNVector3 min = SCNVector3.Zero, max = SCNVector3.Zero;
self.GetBoundingBox(ref min, ref max);
self.Pivot = SCNMatrix4.CreateTranslation(min.X + (self.Width() * 0.5F), min.Y + (self.Height() * 0.5F), 0);
}